Compare Redragon CASTOR K631 HE vs K708 Differences Side by Side

This comparison is for buyers deciding between Redragon's budget gaming specialist and its more feature-rich all-rounder. The choice is difficult because one excels in raw gaming specs while the other offers superior build quality and connectivity. The CASTOR K631 HE is a wired-only 65% board focused on Hall Effect switches and rapid trigger. The K708 is a 75% wireless board with an aluminum case and a screen. Your priority determines the winner.

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Main differences	Released in 2026 Has Magnetic switch options Available in a 65% layout Includes a No display Utilizes Hall effect sensors Enables rapid trigger functionality Supports Wired, Wired only connectivity Runs at a 8000 Hz polling rate Weighs about 638 g Sized at 33 x 323 x 107 mm Made with a Plastic case	Released in 2024 Has Linear switch options Supports hot-swappable switches Available in a 75% layout Comes with a knob Includes a Yes, TFT display Compatible with both Mac and Windows Features N-key rollover Has built-in sound dampening Uses a Gasket Mount mounting style Supports Bluetooth, 2.4 GHz, Wired, Wireless connectivity Weighs about 850 g Sized at 43 x 335 x 140 mm Made with a Aluminum case Features PBT, ABS keycaps
Score	Scores Performance: 91.4 Build Quality: 42.2 Productivity: 47 Customizability: 45.6 Portability: 65.2	Scores Performance: 79.1 Build Quality: 75.8 Productivity: 83.8 Customizability: 74 Portability: 77.6
Name	Name Redragon CASTOR K631 HE	Name Redragon K708
Release year	Release year 2026	Release year 2024
Switch Options	Switch Options Magnetic	Switch Options Linear
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size 65%	Layout Size 75%
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support TFT
Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough
Connection	Connection Wired, Wired only	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate 8000 Hz	Polling Rate -
Battery capacity	Battery capacity -	Battery capacity -
Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style -	Mount Style Gasket Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb	Backlight Rgb
Case Colors	Case Colors	Case Colors
Case Material	Case Material Plastic	Case Material Aluminum
Keycaps Material	Keycaps Material -	Keycaps Material PBT, ABS
Dimensions	Dimensions 33 x 323 x 107 mm	Dimensions 43 x 335 x 140 mm
Weight	Weight 638g	Weight 850g

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Pros and Trade-offs

Your primary use case dictates the choice. If your main activity is competitive gaming where every millisecond counts, the Redragon CASTOR K631 HE is the specialized tool. For virtually any other scenario, including general productivity, multi-device use, or enjoying a more premium typing experience, the Redragon K708 is the more versatile and better-built option. Consider the K708 if your budget allows for its broader feature set.

Redragon CASTOR K631 HE

+Features an 8000Hz polling rate for minimal input latency.
+Equipped with Hall Effect magnetic switches and rapid trigger technology.
+Includes adjustable actuation points from 0.1mm to 4.0mm via software.
+More affordable price point.
+Comes with a portable strap and spare switches.

−Wired-only connectivity limits placement and device switching.
−Plastic case construction feels less premium.
−65% layout lacks dedicated function and navigation keys.
−Not hot-swappable, limiting switch customization.

Redragon K708

+Built with an aluminum case for a more solid feel.
+Offers tri-mode connectivity: Bluetooth, 2.4GHz wireless, and wired.
+Features a TFT color screen and a control knob.
+Hot-swappable PCB allows for easy switch replacement.
+Uses a gasket mount with Poron and silicone sound dampening.

−Heavier and larger than the CASTOR K631 HE.
−Higher price point.
−Polling rate is not specified, so gaming latency is less of a confirmed focus.
−Linear switches are pre-lubed but not user-adjustable like Hall Effect.

Which Keyboard Is Better for Your Needs?

The CASTOR K631 HE is the clear choice for dedicated gaming, while the K708 wins for most other scenarios. For office work, programming, and content creation, the K708's extra keys, wireless modes, and premium features are more valuable. The CASTOR's advantage in travel is due to its lighter weight and smaller size, but the K708 is the superior platform for keyboard modding and customization.

GamingRedragon CASTOR K631 HE

•The CASTOR K631 HE features an 8000Hz hyper-polling rate for lower latency.
•It uses Hall Effect magnetic switches with adjustable actuation points down to 0.1mm.
•It includes dedicated rapid trigger technology for faster key resets.

OfficeRedragon K708

•The K708 offers tri-mode connectivity (Bluetooth, 2.4GHz, wired) for flexible device pairing.
•Its 75% layout retains dedicated function keys and arrow keys for productivity.
•The vendor listing states compatibility with both Windows and macOS.

ProgrammingRedragon K708

•The K708's 75% layout provides arrow keys and some navigation keys without a full-size footprint.
•Its hot-swappable switch sockets allow for easy customization of switch feel.
•The aluminum case and gasket mount may offer a more comfortable typing experience for long sessions.

TravelRedragon CASTOR K631 HE

•The CASTOR K631 HE is significantly lighter at 638g compared to the K708's 850g.
•Its 65% layout is more compact, with dimensions of 323mm x 107mm.
•It includes a portable strap according to its vendor description.

ModdingRedragon K708

•The K708 is confirmed to be hot-swappable, supporting 3-pin and 5-pin switches.
•It features a gasket mount structure and includes Poron and silicone sound dampening pads.
•The aluminum case provides a more premium foundation for modifications.

Content CreationRedragon K708

•The K708 includes a TFT screen and a knob for adjusting settings like volume and brightness.
•Its wireless connectivity reduces cable clutter on a desk setup.
•The aluminum build offers a more premium aesthetic for video or stream backgrounds.